Re: brightness control, all was normally included in the patched DSDT I had posted.
I've made a fresh (re)install of Big Sur 11.7.2 with Clover r4151; will update my guide accordingly very soon. Meantime, do add/replace the following tables (once unzipped) in the ACPI/patched folder of your Clover EFI (you may also add the SSDT-PNLF table to the list specified tables in your Clover config).
SSDT-PNLF.aml.zip
DSDT.aml.zip
Your IOReg clearly shows Big Sur booted but your Clover config does not show the -no_compat_check that's necessary with MBP10,2 bootpack. Did you use the old alternative method of modifying the macOS file that defines the supported models?